Subacute Stroke Gait biomechanics data
Description
The spatiotemporal parameters were measured using Steadys system (Neurosoft, Ivanovo, Russia). Seven inertial sensors were fixed on participant’s pelvis, thighs, ankles, and feet. Each sensor recorded spatiotemporal parameters, joint amplitudes and functional EMGs of lower limb muscles. All participants walked a 10-meter distance, making turns at the end of the distance, and continued walking without stopping until 30–40 gait cycles were accumulated for each leg. The Steadys automatic algorithm discarded steps at the beginning and end of walking, acceleration and deceleration of walking speed, as well as any other unsteady steps (loss of balance, stumbles), leaving only well-recorded gait cycles. As a result of registration, a standard report was obtained containing the spatiotemporal parameters of the gait cycle for each leg, sagittal kinematic parameters for hip, knee, and ankle joints, as well as profiles of the electrical activity of four muscles: quadriceps femoris, hamstring, tibialis anterior, and triceps surae.
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All participants walked a 10-meter distance, making turns at the end of the distance, and continued walking without stopping until 30–40 gait cycles were accumulated for each leg. Assessed temporal parameters included gait cycle and individual time periods measured as percent of gait cycle: stance phase, single limb stance phase, double limb stance phase, and beginning of terminal double limb stance phase. Assessed spatial parameters were foot clearance, circumduction, and velocity. Recorded kinematic parameters of lower limb joints included flexion and extension that were assessed using goniograms automatically generated for each joint by the software. The goniograms were calculated based on all well-registered gait cycles and were used to assess the amplitudes measured in degrees, and corresponding phases measured as percent of gait cycle. Hip joint evaluation included the amplitude and phase of flexion at the beginning of gait cycle, full extension, and swing flexion. Knee joint parameters included the amplitude and phase of the first flexion, the first extension, and the second flexion. Ankle joint was described using the amplitude and phase of the first extension, the first flexion, the second extension, and the second flexion. The profiles of muscular bioelectric activity were used to determine the maximum amplitude (in microvolts, mV) and its phase in percent of gait cycle.